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Shipping now · worldwide

One ring.
Everything measured.

Single-lead ECG, blood-pressure trends, four-stage sleep and 14+ health tools — from four grams of titanium you forget you are wearing.

$299one purchase · no mandatory subscription · HSA/FSA eligible
Buy Ring 2 Find your size
8 days
Battery
30 s
ECG reading
50 m
Waterproof
14+
Health tools
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A hand wearing the Circular Ring on a Paris bridge, the Eiffel Tower behind
Rings & accessories

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The ring, the sizing kit, and the few accessories worth owning. Everything adds straight to your cart.

Circular Ring 2
The most advanced smart ring
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Sizing Kit
Find the perfect fit
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Circular Sleep Mask
Enhance your recovery and sleep quality
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Circular 2 Charger
Portable Charging Case
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Blue Light Blocking Glasses
Protect Your Eyes
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USB-C Cable
Extend Your Charging Experience
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No mandatory subscription
14+ health tools included with the ring, free.
1-year warranty
Manufacturer warranty against defects.
14-day returns
Changed your mind? Send it back within 14 days.
Nine sizes
US 6 to 14. Not sure? Order the ring with a sizing kit.
Pay with HSA or FSA
Circular is eligible for pre-tax health spending.
Check eligibilityFind a retailer

Sizing

Nine sizes. One that disappears.

Circular sizes follow standard US ring sizes and run about half a size above them — if you normally wear a 9, choose a 10. Know your size and you can order in one tap.

I know my size

6 7 8 9 10 11 12 13 14

I don't know my size

Order the ring with a sizing kit. The kit arrives first with all nine sizes — wear the closest for 24 hours, tell us which fits, and we ship your ring in that size.

Order the ring with a sizing kit

Rather measure at home?

A printable guide and the two-minute string method, with the half-size rule already applied.

Open the sizing guide

Recognition

10+industry awards 2018designing in Paris since 50 mwaterproof, tested 14+health tools included
The Circular Ring 2 is shaping up to be quite an innovation powerhouse in the smart ring segment. Armed with an ECG, PPG, and a temperature sensor, it can measure everything from heart rate and blood oxygen saturation levels to ECG activity and heart rate variation.
Digital Trends
Additional upgrades compared to its predecessor, including a better battery life; the company promises eight days. It also comes with enhanced sensors to track key health metrics.
TechCrunch

Pre-tax

Pay with HSA or FSA and keep roughly a third.

Circular is eligible for pre-tax health spending in the US. Most customers cover the ring with funds they already have set aside, which brings a $299 ring closer to $210 out of pocket depending on your bracket.

Check your eligibility

Takes about a minute. No account needed.

Questions

Good to know

Is there a subscription?
14+ tools are available for free and included with the ring, which is already more than the market (on average, 5 of our features). There are some premium paid advanced experiences.
Which sizes are available?
US 6 to 14, nine sizes, and they run about half a size above standard. Not sure of yours? Order a sizing kit, or buy the ring with its sizing-kit option and tell us your size afterwards.
How long does charging take?
Ring 2 charges wirelessly in about 60 minutes, and a full charge lasts up to 8 days.